Electrical Debonding Adhesive Sheet with Folded Voltage Contacts
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Solution Overview
Problem
Existing electrical debonding type adhesive sheets face issues with unstable voltage application due to protrudent parts that are not fixed with adhesive, leading to potential short circuits and increased operation steps, especially when using metal foils as substrates.
Innovation Solution
The adhesive sheet includes a substrate with an electroconductive layer and a base layer, featuring first and second protrudent parts that allow stable voltage application by folding back the first protrudent part towards the second adhesive layer, ensuring consistent electrical contact and minimizing thickness increase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal foil is used as the base layer, then electrical conductivity is improved, but burrs are generated during punching which cause short circuits
Solution Approach 1:
The patent replaces the metal foil base layer with a plastic base layer (such as PET) that is inexpensive and does not generate burrs during punching operations. The electroconductive layer is applied on top of this plastic base layer, providing the necessary electrical conductivity without the harmful burr generation issue of metal foils.
Solution Approach 2:
The patent creates a composite structure combining a plastic base layer with an electroconductive layer. This composite material approach allows the plastic base layer to provide mechanical stability and eliminate burrs, while the electroconductive layer (formed by vapor deposition) provides the necessary electrical conductivity for voltage application.
2Ease of operation
If the substrate for voltage application is made thin and flexible, then ease of application is improved, but contact stability with voltage application device deteriorates
Solution Approach 1:
The patent divides the substrate into two functional segments: a thin flexible plastic base layer for ease of application and handling, and a separate electroconductive layer deposited on top for stable electrical contact. The electroconductive layer is made thicker and more rigid to ensure stable contact with voltage application devices, while the base layer remains thin and flexible.
3Reliability
If the substrate for voltage application is made thick and rigid, then contact stability is improved, but ease of application and handling deteriorates
Solution Approach 1:
The patent separates the functions of flexibility and rigidity into different layers. The plastic base layer is thin and flexible for easy application and handling, while the electroconductive layer is thicker and rigid enough to provide stable electrical contact. This segmentation allows each layer to optimize its properties for its specific function.
4Ease of operation
If a protrudent part is exposed to improve voltage application efficiency, then ease of operation is improved, but stability deteriorates due to lack of adhesive fixation
Solution Approach 1:
The patent merges the protrudent part with the adhesive layer by forming the protrudent part from the adhesive layer itself rather than from a separate substrate. This integration ensures that the protrudent part is firmly fixed to the substrate through the adhesive bonding process, providing both stable electrical contact and mechanical fixation simultaneously.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enables stable electrical debonding of joined bodies by maintaining consistent electrical contact and reducing the risk of short circuits, thereby improving operational efficiency and reducing the number of steps required for debonding.
Implementation Method 1
a substrate for voltage application, which includes an electroconductive layer and a base layer
Implementation Method 2
a substrate for voltage application obtained by forming an electroconductive layer, e.g., a vapor-deposited thin metal film, on a base layer
Data Source
Figure 1~2(b)
Figure 3~4
Figure 5~6
AI summary
The present invention provides an electrical debonding type adhesive sheet capable of producing a joined body in which a voltage can be stably applied to an electrical debonding type adhesive layer. An electrical debonding type adhesive sheet according to a first embodiment of the present invention includes a first adhesive layer, a substrate for voltage application including an electroconductive layer and a base layer, and a second adhesive layer in this order, and has a first protrudent part, in which the first adhesive layer and the substrate for voltage application extend and protrude with respect to the second adhesive layer, and a second protrudent part, in which the substrate for voltage application extends from the first protrudent part and protrudes with respect to the first adhesive layer.